Forces and Energy

Question 1

Law of conservation of energy

Answer 1

Energy cannot be created or destroyed, only transferred

Question 2

splitting atoms

Answer 2

nuclear
store

Question 3

slingshot

Answer 3

elastic potential
store

Question 4

something moving

Answer 4

kinetic
store

Question 5

inverter

Answer 5

electrostatic
store

Question 6

something falling

Answer 6

gravitational potential
store

Question 7

speaker

Answer 7

sound
store

Question 8

fire

Answer 8

thermal
store

Question 9

torch

Answer 9

light
store

Question 10

food

Answer 10

chemical
store

Question 11

Law of conservation of energy

Answer 11

Energy cannot be created or destroyed, only transferred

Question 12

conduction type

Answer 12

thermal energy transfer

Question 13

convection type

Answer 13

thermal energy transfer

Question 14

radiation type

Answer 14

thermal energy transfer

Question 15

conduction definition (4)

Answer 15

When a solid is heated
The particles gain energy and vibrate more.
The particles collide into neighboring particles and pass along the energy.
This causes the neighboring particles to vibrate more.

Question 16

convection definition (8)

Answer 16

When a fluid (liquid or gas) is heated
The particles gain energy; this makes them move faster.
When this happens they move further apart.
This means the fluid is less dense so it will rise.
As the warm fluid rises and meets the cooler fluid it cools down
And because of this, it becomes denser.
When it becomes denser than the surrounding fluid it will start to sink.
This is a convection current.

Question 17

radiation definition (3)

Answer 17

All objects emit radiation in the form of infrared waves.
This can be referred to as thermal radiation or infrared radiation.
As infrared radiation is an electromagnetic wave, it can even travel through a vacuum.

Question 18

Unit of measurement for MASS

Answer 18

kg

Question 19

definition of MASS

Answer 19

the amount of matter an object has

Question 20

Unit of measurement for VOLUME

Answer 20

m³

Question 21

definition of VOLUME

Answer 21

the space that matter takes up

Question 22

Unit of measurement for DENSITY

Answer 22

kg/m³

Question 23

definition of DENSITY

Answer 23

the mass per unit volume

Question 24

DENSITY =

Answer 24

MASS/VOLUME

Question 25

1kg (in g)

Answer 25

1000g

Question 26

1L (in ml, and cm³)

Answer 26

1000ml or 1000cm³

Question 27

1ml = (in cm³)

Answer 27

1cm³

Question 28

What is the density of water

Answer 28

1g/cm³

Question 29

definition of DENSITY

Answer 29

the mass per unit volume

Question 30

DENSITY =

Answer 30

MASS/VOLUME